Thorn Shield

Thorns erupt from your body for the duration of the spell, providing you with a formidable defense. You can end the spell early by using an action to dismiss it.

The thorns grant you resistance to non-magical bludgeoning, piercing, and slashing damage. In addition, whenever a creature within 5 feet of you hits you with a melee attack the thorns burst from your body, immediately regenerating. Every creature in a 5 foot radius takes 2d8 piercing damage.